For my style of fishing which is in front of the hydros and in the 30' hole from the boat ramp over to the hydros I like the water on the lower gauge from12' and below. Five turbines running max and 4' or less open on the dam. Any more than that and you can loose a lot of lures.

If you are drifting and dragging bottom it helps to have a rod with a quick response so when you pull or crank your sinker responds before it is hung. A rod like a flippin stick maybe. Fenwick makes some nice inshore rods of this nature. Get something that will handle up to 4 oz sinkers.
Low stretch line like Sensor also helps a ton regarding hangups, again when you pull on the rod the sinker responds. A there way rig helps for dragging bottom.

I would say the best thing to do over there is talk to others. I have always found most folks below willing to share information.

I like the late summer and fall when the water is lower.

Try searching this forum. I am pretty sure there are some good threads on this.

Good luck